Bicycles do not use fuel as they are human-powered vehicles. They rely on the energy exerted by the rider to propel them forward, so they don't have a fuel efficiency measure like vehicles that rely on internal combustion engines.
Typically, smaller motorcycles and motorized bicycles tend to have better fuel efficiency than larger, more powerful motorcycles.
On average, motorcycles can travel anywhere from 25 to 75 kilometers per liter of fuel (km/L). However, this is a very rough estimate, and the actual fuel efficiency can vary greatly. Some motorcycles designed for fuel efficiency, such as certain models of scooters or small displacement bikes, can achieve even higher fuel efficiency, potentially exceeding 100 km/L under ideal conditions.
It's important to note that these figures are rough estimates and can vary based on many factors. Additionally, advancements in technology and the increasing availability of electric motorcycles and bicycles are gradually changing the landscape of fuel efficiency measurements in the transportation industry.